Coil forming machine



Dec, 26, 1933. H. H. EATON COIL FORMING MACHINE Filed June 1928 ll Sheets-Sheet l Dec, 26, 1933.. H. EATON 11,941,166

COIL FORMING MACHINE Filed June 4, 1928' 11 Sheets-Sheet 2 Dec. 26, 1933.

H. H. EATON COIL FORMING MACHINE Filed June 4, 1928 11 Sheets-Sheet 3 gwuentoo flar/Asafi b. [070/2 TIT-3H Dec. 26, 11933. H. H. EATON 1,941,166

001; FORMING MACHINE Filed June 4, 1928 '11 Sheets-Sheet 4 HI I Dec. 26, 1933. H. H. EATON COIL FORMING MACHINE ll Sheets-Sheet 5 Filed June 4, 1928 gwuentoz attotuuas Dec. 26, 1933. H. H. EATON COIL FORMING MACHINE 11 Sheets-Sheet 6- Filed June 4. 1928 GU50! map Dec 26, 1933.

H. H. EATON COIL FORMING MACHINE Filed June 4,1928 11 Sheets-Sheev'Y gym manic;

attozwuas Dec. 26, 1933. H. H. EATON COIL FORMING MACHINE Filed. June 4, 1928 11 Sheets- $heet 8 1933- H. H. EATON COIL FORMING MACHINE Filed June 4, 1928 ll Sheets-Sheet 9 EN. w .1 IE QB Dec. 26, 1933. H. H. EATON 1,941,166

COIL FORMING MACHINE Filed June 4, 1928 ll Sheets-Sheet l0 nq'm A E U JIIEIM E Q 41' EHXXIX Flam Dec. 26,1933. H. H. EATON COIL FORMING MACHINE 11 sheets-sheet 11 Filed June 928 abboznuas Patented Dec. 26, 1933 UNITED STATES 1,941,166 c011. roams MACHINE Harrison H. Eaton, Toledo, Ohio, assignor to The Electric Auto-Lite Company, Toledo, Ohio, a

corporation of Ohio Application June 4, 1928. Serial No. 282,822

18 Claim.

This invention relates to the formation of the coil material for use in certain types of dynamos or other electric machines, in which it is necessary to bend, twist, or otherwise shape into a predetermined configuration the coil material before the application to the iron core.

An object of the invention is to provide a machine having simplified automatically operated means with which the coil material may be formed.

Another object of the invention is the provision of an eflicient arrangement of parts which permits certain operations to be performed in one coil material while a different operation is taking place in a succeeding coil material thus increasing the efi'iciency of the machine for large scale production.

It is also an object of the invention to so construct the machine that it will require but few operations to form the coil; and its mechanism-of such a character that these operations can be accomplished at a high rate of speed.

Further objects and advantages are within the scope of this invention such as relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to economics of manufacture and numerous other features as will be apparent from a consideration of the specification and drawings of a form of the invention, which may be preferred, in which Figure I is a side elevation of the machine embodying my invention;

Figure II is a front elevation of the machine shown in Figure I;

Figure III is a detail sectional view of an overrunning clutch forming a part of the machine;

Figure IV is a sectional view taken substantially on the line IV--IV of Figure III.

Figure V is a front view of the stock cutting mechanism;

Figure VI is a side view of the mechanism shown in Figure V.

Figure VII is a detail view of the cutting device; Figure VIII isa detail view of the adjusting mechanism for the severing means;

Figure IX is a side elevation of the transferring r and holding means; Figure X is a composite view showing successive positions of parts of the coil ejecting mechanism;

Figure XL is a detail side view of part of the ejecting mechanism;

Figure m1 is a detail side elevation showing the transferring mechanism;

Figure XIII is a fragmentary detail view showing cam actuating mechanism for the transferring means. v

-Figure IflV is a detail side elevation of the mechanism of the centering pin and an auxiliary bending means.

Figure XV is a detail view of the mechanism shown in Figure XIV;

Figure XVI is a detail sectional view showing the centering pin and operating mechanism therefor;

Figure XVII is a view similar to Figure XVI showing the auxiliary bending means and its actuating mechanism;

Figure XVIII is a detail sectional view showing the main coil forming mechanism;

Figure XIX is a view showing the actuating means for the main coil forming mechanism;

Figure XX is a fragmentary detail view of a coil restriking means;

Figure XXI is a detail sectional view showing the actuating mechanism for the coil restriking means;

Figure XXII is an isometric view showing the initial position of the parts of the main coil forming means;

Figure XXIII is an isometric view showing another position of the coil forming means;

Figure XXIV is an isometric view showing a third position of the coil forming means;

Figure XXV is a sideelevation showing the means for forming the ends of coil legs.

Figure XXVI is a view showing cam and rack and pinion mechanism for actuating a portion of the coil forming means;

Figure XXVII' is a side view illustrating a blank of coil material.

Figure XXVIII is a side view illustrating one of the steps in the formation of the coil from the blank;

Figure XXIX is atop plan view of another step in the formation of the coil from the blank;

Figure XXX is a side view of another step in the formation of the coil from the blank;

Figure XXXLis a top plan view illustrating one of the steps in the formation of the coil from the blank;

Figure XXXII is a side view of the formation I shown in Figure XXXV;

Figure XXXVII is a view of the finished coil;

Figure-XXXVIII is an enlarged side elevational view of a stock feeding device;

Figure XXXIX is an end view of the parts shown in Figure XXXVIII.

Referring particularly to Figures I and II of the drawings I have shown the mechanism as mounted upon a suitable main frame 10' com prising a bed plate with its side walls connected by a bridge member and supported by a framework 11. The stock used in the present instance from which the articles are to be formed is in the nature of a flat bar of a substantially rectangular cross section, and comes in rolls or reels. It is to be understood that I contemplate the use of materials of different cross sections. As shown in Figure I the supply roll 12 is supported on the frame work 11 upon a suitable supporting device. The end of the stock is first passed through an unreeling mechanism or auxiliary feeding device 230 which unwinds the wire from the supply roll for the purpose as will hereinafter appear. As particularly shown in Figures XXIX and XXX, the stock is then passed through the main feeding mechanism which advances the same through suitable straightening devices 13 and 14. The straightening devices consist of two sets of rolls 13' and 14' through which the stock passes, each set being positioned at right angles to the other. It will be obvious that should the wire be bent in any way, the stock passing through the two sets of rolls will be completely straightened out before its introduction into the forming mechanism. The main feeding mechanism is adapted to be operated intermittently to feed the stock forward a predetermined length upon each feeding operation, and preferably said length exactly corresponds to the amount required to form the coil or article to be manufactured. The feeding device here shown (see Figures I, II, XXIX and XXX) comprises a pair of feeding disks 15 and 16 mounted on the auxiliary frame 17 rigidly secured to framework 11 and supported thereby. The stock is frictionally engaged between said disks. As shown, the lower disk 16 is mounted on shaft 18 journalled in frame 1'7, and the upper disk 15 is journaled on lever 19 pivotally mounted between its ends, a spring 20 acting on the arm 20 forming a part of the frame 17, the spring 20 acting to normally hold disks 15 and 16 in engagement.

Suitable means are provided for manually moving the upper disk to permit the stock to be placed between said disks and consists of a bell crank lever 21 pivoted at 22 cooperating with link 23 to move said disk when the lever is actuated in one direction.

Shaft 18 is driven through the one way clutch 25 by means of a pinion, 26, cooperating with the arcuated oscillating rack 27 pivoted at 28. Oscillatory movement is imparted to this rack by means of the rocking ram or pitman 29 pivotally connected at its lower end to said rack, and at its other end connected to a wrist pin 30 which is mounted on an adjustable support 32 on the continuously rotating disk 44 fixed to the main drive shaft 45. The main drive shaft 45 extends transversely of the main frame 10 and is mounted in suitable bearings projecting beyond the frame. The other end of the shaft supports a flywheel 36 which serves as a belt pulley by means of which power is applied to said shaft 45, to which are secured all the cams that operate-the different mechanisms of the machine as hereinafter will appear. It can be seen in Figures I, III, IV, XXIX and XXX that the lower disk 16 moves only in one direction by the use of the clutch 25. It should be noted that the radial distance between the wrist pin 30 and the axis of the shaft 45 controls or regulates the amount of longitudinal motion imparted to the arm 29 and consequently the degree or amount of rotary movement of the arcuate rack or sector 27. By adjusting the position of the wrist pin radially through manipulation of screws 33 and 34, which obviously move a block 30' carrying the wrist pin 30 toward or away from the shaft 45, the movement imparted by the arm 29 to the arcuate rack 27 may be varied and the length of stock fed upon each operation by said feeding mechanism may be regulated.

I provide means to sever the stock after the same has been advanced the proper length into the -mechanism and prior to the operation of any of the bending devices.

The cutting mechanism here illustrated is shown in Figures V, VI and VII and includes a fixed cutting agent 39 supported by a member 40 attached to the main frame 10 and provided with a suitable opening in which the movable shaft 41 is journalled. One end of the shaft 41 is provided with a hardening bushing 41 fixedly secured thereto, the shaft and bushing being formed with an angular recess 42. Shaft 41 and bushing 41' act as the movable cutting member 00-- operating with member 39 to sever the stock, said angular or wedge shaped recess 42 permitting the movement of the cutting means, without bending the portion of the stock remaining in the recess 42 during the stock severing operation. Arm 46 is loosely mounted at the opposite end of shaft 41 and is prevented from being displaced by means of a member 46' and drives the shaft 41 by a projection 47 which bears against screws 48 and 49 threaded in opposite sides of said arm permitting the proper adjustment for aligning the movable cutting agent 41 with its fixed member 39. The arm 46 carries a cam roller 50 adapted to engage cam projection 51 fixed to the continuously rotating disk 44 fixed by the main drive shaft 45. The spring 52 serves to hold the roller in constant engagement with the rotating disk 44 carrying the cam projection 51, of contour suitable to periodically oscillate shaft 41 and bushing 41 to cut the stock, the spring 52 returning the cutting means to its normal or idle position at the end of each severing operation. Referring particularly to Figures VI and VII, a block 53 is fixed upon one end of the member 40 adjacent the angular slot 42 for the purpose of properly guiding the stock through the cutting devices and preventing lateral movement of the same.

As the stock is being fed forward through the straightening and cutting devices by the feeding mechanism it is received in aligned apertures 56 provided in the supporting plate 53' fixed to the main frame 10 and in the transferring fingers 55, plate 53' having recesses 54 adapted to accommodate the movable transferring fingers 55 which resiliently hold and carry the stock to the bending devices after the severing operation. The resilient means for holding the stock in the fingers 55 comprises a plurality of tension plates 55 secured to the fingers as particularly shown in Figures XX and XXI. The aligned apertures 56 are partially closed lengthwise by the projection 59 of stock holding arm 58 pivoted at 61 and actuated at its other end by lever 62 pivoted at 64 receiving its movement by the action of cam projection 51 fixed to the continuously rotating disk 44. Spring 65 serves to hold the end of lever 62 in constant engagement with the disk 44 causing the stock retaining arm 58 to return to its normal or holding position after each operation.

The mechanism provided to operate the transferring fingers 55 which carry the stock to the bending devices is illustrated in Figures XII and XIII and comprises a reciprocating rack '70 mounted in a suitable bearing block 78 adapted to impart oscillatory motion to said fingers by its meshing with pinion '72 secured to shaft 71 to which the fingers 55 are fixed. The reciprocating movement is imparted to said rack '70 by the cam projection on the continuously rotating cam '74 upon which the roller '73 carried by said rack is in constant engagement by means of spring '75 acting upon lever '77 secured to shaft '71. The cam '74 is fixed to main drive shaft 45, and is driven thereby.

In the present embodiment of my invention I have provided very simple and efficient means to bend the coil material to a predetermined configuration by the means shown in the diagrammatic views Figures XXII, XXIII and XXIV comprising: the barrel shaped member 80, a flapper or oscillating member 81 and a centering pin 84. The barrel 80 and flapper member 81 are provided with stock receiving slots 83 into which the stock is' placed by the transferring fingers 55'. Grooves or recesses 85 are provided in members 80 and 81 and are so spaced as to correspond to the transferring fingers and permit the insertion of the stock into said slots 83 by said fingers 55.

The centering pin 84 around which the stock is bent is actuated prior to the returning action of fingers 55 and prevents the stock from being carried back by said fingers 55. The centering pin 84 is slidably mounted in the bearing block 8'7 secured to the bed plate of main frame 10. The mechanism for the centering pin 84 is illustrated in Figures XIV to XVI and includes the movable member 88 having a pin 89 which engages a recess 90 in projection 91 of the member carrying said center pin. Member 88 is secured to shaft 92 and receives its movement from arm 93 which carries a cam roller 95 cooperating with cam projection 96 mounted on the cam '74 driven by main drive shaft 45.

Spring 98 serves to hold said roller in constant engagement with cam '74 causing the centering pin to return to its normal or idle position after the lever 93 has been actuated by the cam projece tion 96.

In order to hold the stock in the barrel member 80 and prevent any longitudinal sliding of the stock during the bending operation by member 81 around centering pin 84, I provide a very satisfactory arrangement consisting in bending the end of the stock extending outwardly from the slot in the barrel member 80 by means of a rod 99 carried by lever 100 fixed to shaft 92 carrying member 88 which actuates the centering pin 84. The movement of rod 99 against the end of the stock imparts the provisional bend illustrated in Figure XXVIII. From this it will be seen that the centering pin 84 and the rod 99 are simultaneously actuated. The cam projection 96 that actuates the centering pin 84 as well as the rod 99 that imparts a provisional bend to the stock is so timed that immediately upon the flapper reaching the end of'itsbending movement said two members are returned to their normal or idle position.

The mechanism provided to actuate the flapper member 81 is illustrated in Figures XVIII and XIX and comprises a reciprocating member 104 provided with a toothed rack 105 mounted on the bearing support 106 in the main frame 10. The flapper member 81 is secured to shaft 109 and receives its actuation from pinion 108 being in mesh with toothed rack 105. The member 104 carrying the toothed rack 105 is reciprocated by means of the two parallel cams 111 and 113 which are fixed to main drive shaft 45 and cooperate with cam rollers 112 and 114. Said rollers .are carried in projections of crank arm 116 pivoted at 117. said crank arm being provided with a toothed sector 119 in mesh with toothed portions 120 of the member 104 whereby a reciprocating movement is imparted to said rack 105 which in turn rotates shaft 109 carrying flapper member 81 to the position shown in Figure XXIII doubling the stock upon itself thereby causing the ends thereof to lie edge to edge in a common plane as illustrated in Figure XXX. The shape of cams 111 and 113 which actuate the flapper member 81 carrying a portion of the stock and bending the same, is such that said member will be quickly actuated while bending said stock and will be held in such position prior to its return to normal or idle position for a length of time sufficient to enable the barrel member 80 to rotate, and the actuation of the dies used to impart a predetermined configuration to the free ends of the coils.

In order to prevent the portion of the stock in the slot 83 of barrel member 80 from coming out during the operation of said barrel, I provide holding arm 125 bearing on top of barrel 80 and in a very close proximity to the position taken by the flapper member 81 after the bending operation already described. The holding member 125 pivoted at 126 and connected by means of link 128 to crank 129 secured to shaft 131 mounted in suitable bearings, the shaft also carrying a lever 132 provided with a cam roller 134 bearing against the side of cam 113 to which a cam projection 136 is fixed and timed to impart movement to said arm 125 prior to the actuation of the barrel 80 and only permitting returning to idle position.

While the portion of the stock bent by the action of the flapper member 81 is held by said member on top of barrel 80, the portion of the stock held by said barrel is moved to a set angle by a fractional rotation of member 80 which mechanism is illustrated in Figure XXVI and comprises the grooved cam 140 secured to the main drive shaft 45 and adapted for engagement with the cam roller 142 carried by the sliding member 144 which is mounted in the bearing block 146 secured to the bed plate of main frame 10. The sliding member 144 is formed with a toothed rack portion 147. The teeth of this rack mesh with pinion 149 secured to shaft 150 mounted on suitable bearings and adapted to move the same. The barrel member 80 is fixed to said shaft and is rotated thereby.

It will be noted that the barrel member 80 carrying a portion of the stock will be positively actuated by the cam and its cooperating roller; whereby the movemcnt of said rack will impart a rotary motion to said barrel 80 causing the stock to take the form shown in Figure XXXI, where it can be seen that this portion has been moved on, a longitudinal axis; the barrel taking the position shown in Figure XXIV.

In the cycle of operations of my machine I desire to give a predetermined configuration to the ends of the coil as illustrated in Figure XXXIV.

For this purpose I provide a set of dies 155 and 156 (see Figure XXV). Die 155 is mounted on a suitable support 157 adjacent the forward end of barrel 80 and cooperates with the movable die 156. The die 156 is carried by one end of a bell crank lever or ram 158 pivoted at 160 carrying at its other end a cam roller 161 bearing against the continuously rotating cam 163 fixed to main drive shaft 45. To insure the proper actuation of the ram 158 I provide a cooperating roller 165 carried between the ends of lever 166 which is pivotally mounted at one of its ends on support 146. Said lever is connected at its other end to the ram or lever 158 by a connecting member 167. The cooperating or auxiliary roller 165 used to impart motion to the ram or lever 158 bears against cam 170 fixed to the main drive shaft 45.

The shape of cams 163 and 170 is of such character that the proper actuation is communicated to die 156 which cooperates with the fixed die plate 155 toimpart the predetermined configuration to the ends of the coil adjacent the portion of the stock held in the barrel or flapper 81 without undue strain on said coil material by preventing a very rapid descending action and returning said movable die to its idle or normal position after said operation. The operation of said dies will overcome the provisional bend imparted to one end of the stock and will cause the ends of the coil to take the form illustrated in Figure XXXIV.

In order to insure the similarity of the oblique formation of the V shaped portion of said coil which I found not absolutely necessary, I provide means to strike the oblique end that extends from the portion moved by the barrel member 80. To that end I provide a movable or rocking die 175 journalled on shaft 150 and actuated by lever 1'77. A stop 178 is secured to one side of ram 158, and has a projection 179 which engages a cooperating groove 181 in said lever and actuates the same, which in turn rocks die 175 forcing the same against the fixed die 184 straightening one leg of the V-shaped bight of the coil, as clearly shown in Figures XX and XXI. Spring 185 returns said die to its normal or idle position. From the foregoing, it will be seen that the movable die, used to give a predetermined configuration to the free ends of the coil, and the die used to strike one of the oblique portions of the center of said coil are simultaneously actuated.

As has been pointed out above, after the actuation of the dies, which is the final operation on the coil material, the flapper 81 is returned by its cam operating mechanisms to its normal or idle position and at the same time the holding member 125 is raised from the top of barrel 80 permitting theremoval of the coil from the machine.

Suitable devices may be used to facilitate the removal of the coil after the same has been completed. To this end I provide on bell crank arm 190 a projection 192 extending into a groove on barrel 80. See Figures XVIII to XX. Said arm is pivoted at 193 and spring 195 tends to hold the projection on said member against the wall of said barrel groove. The arm 196 is acting as a connecting link between crank lever 190 and crank lever 198 pivoted at 200, one arm of which extends in the path of rack 105 and is adapted to be actuated thereby. It can be seen that when the rack 105 is moved in the direction indicated by the arrow, the flapper member is returned to its normal or idle position and that at the end of the travel of rack 105, movement is imparted to lever 198 which in turn moves bell crank 190 against the action of spring 195 to impart upward movement to projection 192 raising the portion of the coil resting in the slot of barrel 80. To avoid any great stress in any portion of the coil while the ejection takes place, I provide at the end of hell crank lever 210 a. projection 211 which rests in a groove in barrel 80, and which exerts a slight spreading action while it is raising the coil from the mechanism. See Figures IX and XX.

The crank lever, 210 is provided with a projection 211 which acts on that portion of the coil material which during the bending operations was held by the flapper member 81 and which rests on the periphery of barrel member 80. The crank lever 210 is journalled on shaft 71 and is actuated by means of link 212 which serves to connect the lever with a cross arm 214 pivoted between its ends at 215 to the main frame 10 of the machine as shown in Figures II and IX and carrying at its other end a cam actuated roller 216 which is adapted to cooperate with cam projection 218 fixed to the continuously rotating disk 44 driven by the main drive shaft 45.

The ejector proper consists of a kicker arm 220 located adjacent the barrel 80, see Figures X and XX and is adapted to kick the middle portion of the coil by means of spring 221 acting on said arm. This arm 220 is pivotally mounted on stud 223 and is adapted to swing the coil outwardly when said coil has been raised by the two ejector members 192 and 211 above described. The kicker arm 220 is moved by a cam 225 located adjacent the lower end of the shaft carrying the flapper member 81 and due to the respective angular relationship, the said arm 220 is moved by said cam 225 away from the coil, but when the flapper 81 is returned to its normal position after the coil has been completely formed said arm 220 is released by cam 225 permitting it to strike or kick said coil at its looped end, by the action of the spring 221 ejectingQthe same from the mechanism. This action will be apparent from examination of Figures IX, XI'and XX showing successive positions of the flapper and coil ejectof the completed coils engages the rod 250 and slidesover the same. The standard 251 is so shaped as to prevent the coils from passing over the same. When a sufficient number of completed coils is supported by said rod, the same is removed as a unit by the operator and an empty rod is located in its place.

In addition to the stock feeding means hereinbefore described, I have provided a supplemental or auxiliary feeding means 230 (see Figure I), the purpose of this means being to prevent the strain of uncoiling the stock from the supply reel 12 being transmitted to the main feeding disks 15 and 16 whereby the possibility of slipping of said disks while feeding the stock is completely eliminated. The auxiliary feeding mechanism 230 is continuously actuated by means of belt 243 connected to e oulley 243 (see Figure II) supported on the main drive shaft 45 and its cooperating pulley 238 fixed on shaft 234 mounted on suitable bearing on frame 231 of the auxiliary feeding mechanism proper.

The feeding mechanism comprises a pair of feeding disks 232 and 233 which hold the stock in frictional engagementtherebetween. The lower disk 232 is secured to shaft 234 and is driven thereby. The upper disk 233 is journalled at one end of lever arm 235 pivotally mounted at 236.

' the other end of said lever.

' operated at a suitable speed so that it will uncoil the stock from the main roll 12 and will maintain a suitable amount of stock preventing any extra load to the main feeding devices, thereby insuring that the same predetermined length of stock will be fed upon each operation of the main feeding mechanism.

The method of operation of my machine is as follows:

Referring to Figure I it will be seen that the stock material is uncoiled from the supply roll 12 by means of the auxiliary feeding mechanism 230 and later advanced intermittently in sections of a predetermined length by the disks 15 and 16 of the main feeding mechanism through the straightening devices 13 and 14 and is received in aligned apertures 56 located in the supporting plate 53 and in the transferring fingers 55. The apertures 56 are partially closed lengthwise by the projection 55 of holding arm 58 acting as retaining means (see Figure IX).

When a predeiermined length of stock has been advanced to the mechanism by the feeding devices the same is severed by the cutting means illustrated in Figures V to VII. After the length of the sock is severed the holding arm 58 carrying projection 59 is moved, whereupon the fingers 55 are actuated carrying the length of the severed stock to slots 83 provided to receive the same in barrel shaped member and flapper member 81.

The portion of said sock projecting in the forward end of the barrel shaped member 80 is provisionally bent by the action of the rod 99 and prevents any longitudinal sliding action of said coil material. This auxiliary bending action takes place at the same timethat the centering pin 84 is raised to its operating position. The centering pin 84 performs two important functions: first, it serves to hold the severed stock in the slot 83 of the main bending devices 80 and 81 so that the same is not carried back by the transferring finger 55 in their movement to normal or receiving position; and second, acts as a pivot around which the coil material is bent by the member 81.

The difierent steps in the bending operation of the coil material are shown in the diagrammatic views Figures XXII, XXIII and XXIV.

It can be seen that the barrel shaped member 80 holds a portion of the stock and that the provisional bend in said portion prevents any longitudinal sliding action while the flapper or oscillating member 81 moves the remaining portion around the centering pin 84 to approximately 180 degrees, the resulting form of the stock being a U shape with the leg portions in substantially one plane as shown in Figure XXX. The member 81 remains in the position illustrated in Figure XXIII and holds the stock in said position against the periphery of member 80. After this operation the centering pin 84 and the simultaneously operated rod 99 are returned to their normal or idle position.

Prior to the actuation of barrel shaped member 80 the holding arm 125 is moved and bears against the periphery of said member preventing the portion of the stock material in slot 83 from coming out during its movement to a set angle.

Referring to Figure XXIV it can be seen that the angular movement of the barrel member 80 carrying that portion of the stock material located in its slot 83 while part of the remaining portion is held by the flapper member 81, the central portion of this material takes a substantially V shape the resulting form imparted to this coil material being illustrated in Figure XXXI.

The next operation imparted to the siock material in the formation of my completecoil, is the predetermined configuration to the ends of the coil resulting in the form illustrated in Figure XXXIV. Said configuration is given to the ends by impinging the action of the movable die 156 carried by the ram 158 against the fixed die 155 located at the forward end of the barrel shaped member 80 over which the ends of the coil project; see Figure XXV. The impinging action of these dies upon the coil material overcomes the provisional bend already imparted to one end of this material and causes the ends to take the form illustrated in Figure XXXIV. The impinging action of these dies upon the ends of the coil loosens any binding tendency of the portions in slots 83 against the walls thereof permit'.ing these portions to be dislodged with great ease whereby the ejection of the completed coil is greatly facilitated.

As pointed out above, the racking die 175 (see Figs. XX and XXI) is actuated by the ram 158. Said racking die insures by striking the oblique' end that extends from the part moved by barrel 80 the similari'y of the central portions of the coil; similarity which I found is not absolutely necessary in practice and therefore this restriking operation can be dispensed with. The formation of the leg portions of the sock material completes the operation of the coil and the finished article is illustrated in Figure XXXVII.

After the action of the ram 158, the flapper member 81 is returned by its cam actuating mechanism heretofore described to its normal position, and simultaneously the stock holding arm 125 is raised from the periphery of the barrel member 80 to its idle position permitting the coil ejecting means 192 and 211 to dislodge the parallel portions of the coil resting in slot 83 as heretofore described, and the ejection of the coil by the ejector on kicker arm 220 located adjacent to barrel shaped member 30. (See Figs. IX, X, XVIH and XX.)

Special reference is made to the feature of my invention wherein, while the main bending operations are taking place, a portion of the coil material is simultaneously fed .by the main feeding devices to the mechanism. This portion is later severed by the cutting devices heretofore described permitting that this severed length of the coil mai'erial be moved by the transferring finger 55 to the receiving slot 83 located in barrel member 80 and flapper member8l after the completed coil has been ejected from the mechanism and immediately following the returning action of these two members to normal receiving position.

It is apparent that, within the scope of the invention modifications and different arrangements may be made other thanis herein disclosed, and the present disclosure is illustrative merely, the invention comprehending all variations thereof.

What I claim is:

1. In a machine of the character described, the combination of means to hold an end portion of a length of coil making material; means to move the other end portion of said material toward said held portion; means to cause relative movement between said portions whereby said coil material assumes a predetermined configuration.

2. In a machine for making coils, the combination of a plurality of holding elements for a strip of material; means operating on said elements for moving one with respect to the others to bend said strip of material forming substantially parallel opposite portions; means to hold one of the parallel bent portions relatively stationary; means to move the other bent portion away from said first mentioned portion whereby the portions assume a predetermined relative position.

3. In a machine for making coils, the combination of means to hold a portion of a strip of material relatively stationary for bending said strip upon itself to form leg portions; means to hold one of said legs relatively stationary; and means to move another portion away from said first mentioned leg.

4. In a machine of the character described, the combination of means to bend a material for making coils to form opposing portions including relatively movable holding elements for the material; and means operating on one of said elements to move one of said portions about its longitudinal axis to a set angle, the other of said elements remaining stationary.

5. In a machine of the character described, the combination of means to double a strip toward itself to form leg portions including a plurality of relatively movable elements; means to hold a portion of one of said legs relatively stationary; and means to move the remainder of the bent strip away from said first mentioned held leg portion.

6. In a mechanism of the character described, means including relatively movable elements for bending a fiat bar of metal between the ends thereof causing the ends to lie with their flat surface in substantially the same plane; means for holding one end in said plane; and means adapted to move the other of said ends out of said plane.

'7. In a machine of the character described, the combination of means to hold a portion of a strip; means for moving another portion relative to said held portion for bending said strip toward itself to form leg portions; means to hold a portion of one of said legs relatively stationary; means to move a portion of the other leg away from said first mentioned stationary leg whereby the middle portion of the bent strip will take a predetermined configuration.

8. In a mechanism of the character described, means including holding elements movable with respect to each other to bend a bar of metal, causing the ends to lie in substantially the same plane; means adapted to move one of said ends out of said plane; and cooperating die elements adapted to give a predetermined shape to said ends.

9. In a mechanism of the character described, a device adapted to act on a portion of a flat bar of metal holding another portion relatively stationary for bending said bar upon itself; a member around which said bar is bent; means for holding a portion of said bar relatively stationary; a device adapted to separate one portion of said shaped bar moving said portion at substantially right angles from the other portion whereby the middle portion will form a predetermined shape and the other portions will be substantially parallel.

10. In a mechanism of the character described,

,in combination, feeding and severing means for a continuous supply of material; means to bend said material causing the ends to lie in substantially the same plane; means adapted to move one of said ends out of said plane; and means to give a predetermined shape to said ends.

11. In a mechanism of the character described, including a two-part forming mechanism having aligned stock receiving means; means adapted to oscillate one of said parts to and away from the other part; and means adapted to rotate the other part.

12. In a mechanism of the character described, a movable member adapted to impart a predetermined configuration to the end portions of a coil material; means operated by the movement of said member to perform a simultaneous operation on the middle portion of said coil material.

13. In a mechanism of the character described, a relatively oscillatable member; a rotatable cam adapted to impart motion to said member; means actuated by the oscillation of said member for periodically severing successive portions of material from a supply; and means for changing the amplitude of movement of said member.

14. In a mechanism of the character described, means for feeding a material intermittently; comprising means adapted for engagement with the material; and means including an overrunning clutch for intermittently operating said material engaging means.

15. In a mechanism of the character described, means for feeding a material intermittently; comprising means adapted for engagement with the material continually operating actuating means; and means including an overrunning clutch for periodically connecting said actuating means to said material engaging means.

16. In a mechanism of the character described, cam actuated means adapted to perform successive operations on a length of coil material; means for driving said cam, and means simultaneously operated by said cam driving means to perform operations on another length of coil material.

17. In a machine of the class described, stock feeding means; a stock severing means; a twopart forming mechanism including a rotary barrel and a pivoted flapper having aligned stock receiving means; means for transferring severed strip of stock to said retaining means; means to contact with said stock at the middle portion thereof, means to turn said flapper against said barrel with the stock held by said last mentioned means; means for rotating said barrel to operate the portion of stock contained therein away from the stock held by said flapper; a standard driven shaft provided with cams for operating said means and a pitman rod operated from said shaft for periodically actuating the stock feeding means and auxiliary continuously operating stock feeding means.

18. In a mechanism of the character described, a rotary stock holding element; an oscillating stock holding element; said elements having aligned stock receiving means; a reciprocating stock engaging pin positioned adjacent to said CERTIFICATE OF CORRECTION. 7

Patent No. 1,941,166. December 26, 1933.

HARRISON H. EATON.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 56, for "ram" read arm; same page, line 99, for "member" read means; page 5, line 126, for the numeral "30" read 80; and line 140, after "normal" insert the word or; and that the aid Letters Patent should be read with these corrections therein that the same may coniorm to the record of the case in the Patent Office.

Signed and sealed this 3rd day of April, A. D. 1934.

F. M. Hopkins (Seal) Acting Commissioner of Patents. 

